Execution after confusion_InheritDocPostProcess error，is an invalid character.

[gaoyang]

Since my assembly was obfuscated (only obfuscated below internal), the following exception was thrown.

I wonder if we can avoid this problem by not using utf8 encoding.

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SauceControl.InheritDoc.targets(30,3): Error : '�', hexadecimal value 0x18, is an invalid character.
at System.Xml.XmlUtf8RawTextWriter.InvalidXmlChar(Int32 ch, Byte* pDst, Boolean entitize)
at System.Xml.XmlUtf8RawTextWriter.WriteAttributeTextBlock(Char* pSrc, Char* pSrcEnd)
at System.Xml.XmlUtf8RawTextWriter.WriteString(String text)
at System.Xml.XmlWellFormedWriter.WriteString(String text)
at System.Xml.XmlWriter.WriteAttributeString(String prefix, String localName, String ns, String value)
at System.Xml.Linq.ElementWriter.WriteStartElement(XElement e)
at System.Xml.Linq.ElementWriter.WriteElement(XElement e)
at System.Xml.Linq.XElement.WriteTo(XmlWriter writer)
at System.Xml.Linq.XContainer.WriteContentTo(XmlWriter writer)
at System.Xml.Linq.XDocument.WriteTo(XmlWriter writer)
at InheritDocProcessor.InheritDocs(String asmPath, String docPath, String outPath, String[] refPaths, String[] addPaths, ApiLevel trimLevel, ILogger logger)
at InheritDocTask.Execute()

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